{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nNote that the provided abstracts do not mention MIR6750. Instead, these studies focus on the functions of non‐classical progesterone receptor membrane components—principally PGRMC1 (and its partner proteins such as SERBP1 and the related PGRMC2)—which appear to serve multifaceted roles across various tissues and physiological processes."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "4"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn the context of female reproduction, PGRMC1 and PGRMC2 are shown to be vital for proper uterine function, oocyte maturation, and early pregnancy events. They facilitate steroid‐dependent cellular differentiation and modulate processes such as apoptosis, cytoprotection, and decidualization. Disruption of these proteins in animal models leads to altered folliculogenesis, postimplantation embryonic loss, and features of premature reproductive senescence."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "3"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nOther studies extend the role of PGRMC1 to metabolic regulation. For example, interactions between PGRMC1 and the GLP‑1 receptor on pancreatic β‑cells enhance insulin secretion via both cAMP and growth factor (EGF receptor–PI3K) signaling; moreover, PGRMC1 modulates hepatic de novo lipogenesis via its association with SREBP‑1, impacting the development of non‑alcoholic fatty liver disease and rendering liver tissue more vulnerable to metabolic stress."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "5", "end_ref": "9"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nAdditional research demonstrates that PGRMC1 has a pivotal role in maintaining cytochrome P450 protein stability independent of its heme‐binding activity, a function with significant implications for drug metabolism and cellular homeostasis. In parallel, PGRMC1 acts as a cargo receptor in RTN3‑dependent ER‑phagy by selecting specific, smaller misfolded prohormones for lysosomal degradation, thereby protecting cells from accumulation of toxic protein aggregates."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "10"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nFurthermore, PGRMC1 influences inflammatory and proliferative responses in diverse tissues. In the brain, for instance, down‐regulation or antagonism of PGRMC1 enhances proinflammatory cytokine signaling and viral proliferation, whereas in breast cancer cells, its expression correlates with estrogen receptor status and mediates the proliferative effects of certain synthetic progestogens. There is also evidence suggesting compensatory interactions between sigma receptors and PGRMC1 in the retina."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "12", "end_ref": "16"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Kaushik Ghosh, Alisha M Thompson, Robert A Goldbeck, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Spectroscopic and biochemical characterization of heme binding to yeast Dap1p and mouse PGRMC1p."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Biochemistry (2005)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1021/bi0511585"}], "href": "https://doi.org/10.1021/bi0511585"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "16342963"}], "href": "https://pubmed.ncbi.nlm.nih.gov/16342963"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Ling Zhang, Yoshiaki Kanda, Drucilla J Roberts, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Expression of progesterone receptor membrane component 1 and its partner serpine 1 mRNA binding protein in uterine and placental tissues of the mouse and human."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Mol Cell Endocrinol (2008)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.mce.2008.02.012"}], "href": "https://doi.org/10.1016/j.mce.2008.02.012"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "18440126"}], "href": "https://pubmed.ncbi.nlm.nih.gov/18440126"}]}, {"type": "r", "ref": 3, "children": [{"type": "t", "text": "Meng Guo, Cheng Zhang, Yan Wang, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Progesterone Receptor Membrane Component 1 Mediates Progesterone-Induced Suppression of Oocyte Meiotic Prophase I and Primordial Folliculogenesis."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Sci Rep (2016)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1038/srep36869"}], "href": "https://doi.org/10.1038/srep36869"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "27848973"}], "href": "https://pubmed.ncbi.nlm.nih.gov/27848973"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "John J Peluso, Xiufang Liu, Tracy Uliasz, et al. 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"}, {"type": "b", "children": [{"type": "t", "text": "Progesterone receptor membrane component 1 is a functional part of the glucagon-like peptide-1 (GLP-1) receptor complex in pancreatic β cells."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Mol Cell Proteomics (2014)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1074/mcp.M114.040196"}], "href": "https://doi.org/10.1074/mcp.M114.040196"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "25044020"}], "href": "https://pubmed.ncbi.nlm.nih.gov/25044020"}]}, {"type": "r", "ref": 6, "children": [{"type": "t", "text": "Nicole C Clark, Cindy A Pru, Siu-Pok Yee, et al. 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